The Telekom Distribution Partner Portal (T‑VPP) is the central entry point for both internal and external sales of Deutsche Telekom products. Our distribution partners use T‑VPP to market fixed-line and mobile products via a unified web interface and B2B web service integrations.

We are looking for a Senior Developer with strong backend expertise to strengthen our team. More than 80% of the daily work is focused on backend development (enterprise services, integrations, security, data processing), while around 20% involves frontend tasks.

Your Main Focus

Backend development with Spring-based enterprise applications (80%)
Integration with internal and external systems via REST and SOAP
Secure API design and implementation
Production support, monitoring, and performance optimization
Occasional frontend work (JSF/React/Angular) (~20%)

Core Technical Requirements (Most Important)

Deep knowledge of Spring Core (IoC, bean lifecycle, AOP, scopes)
Strong experience with Spring Security (authentication, authorization, OAuth2, SAML, session handling)
Solid expertise with Spring Data (JPA) and relational databases
Extensive experience designing and implementing REST and SOAP services
Strong Java knowledge (Java 11+) and enterprise application design

System Design & Architecture

Strong system design skills
Knowledge of core design patterns and architectural principles
Experience designing scalable, secure enterprise systems
Ability to analyze trade-offs and propose sustainable technical solutions

Production & Operations Experience

Real production experience maintaining enterprise applications
Ability to investigate complex production issues
Experience with monitoring and metrics tools (e.g., ELK, Grafana)
Understanding of performance tuning and troubleshooting under load

DevOps & Infrastructure

Hands-on experience with Docker
Experience deploying applications to Kubernetes
Familiarity with GitLab CI/CD pipelines
Understanding of deployment strategies and environment configuration

Security Awareness

Strong understanding of secure coding practices
Awareness of OWASP recommendations (e.g., OWASP Top 10)
Experience implementing secure authentication and authorization flows
Understanding of common web vulnerabilities and mitigation strategies

Nice to Have

Experience with AWS Cloud
Messaging systems (Kafka, JMS)
Experience with enterprise integration patterns
Frontend frameworks (React, Angular)

Soft Skills

Strong communication skills
Ability to challenge and refine requirements
Fluent technical English
Ownership mindset and proactive approach

This position is ideal for a senior engineer who enjoys working on complex enterprise systems, values clean architecture, and is confident operating in production environments.

* Please be informed that our remote working possibility is only available within Hungary due to European taxation regulation.

Full-Stack Developer (REF4999W)

TLDR